Providing power availability information to memory

ABSTRACT

The present disclosure includes apparatuses and methods for providing power availability information to memory. A number of embodiments include a memory and a controller. The controller is configured to provide power and power availability information to the memory, and the memory is configured to determine whether to adjust its operation based, at least in part, on the power availability information.

PRIORITY INFORMATION

This application is a Continuation of U.S. application Ser. No.16/513,115, filed on Jul. 16, 2019, which is a Continuation of U.S.application Ser. No. 15/843,195 filed Dec. 15, 2017, now U.S. Pat. No.10,424,347, issued Sep. 24, 2019, which is a Continuation of U.S.application Ser. No. 15/434,748 filed Feb. 16, 2017, now U.S. Pat. No.9,905,275, issued on Feb. 27, 2018, which is a Continuation of U.S.application Ser. No. 15/090,870 filed Apr. 5, 2016, now U.S. Pat. No.9,607,665, issued Mar. 28, 2017, which is a Divisional of U.S.application Ser. No. 14/288,618 filed May 28, 2014, now U.S. Pat. No.9,343,116, issued May 17, 2016, the specifications of which areincorporated herein by reference.

TECHNICAL FIELD

The present disclosure relates generally to semiconductor memory andmethods, and more particularly, to providing power availabilityinformation to memory.

BACKGROUND

Memory devices are typically provided as internal, semiconductor,integrated circuits and/or external removable devices in computers orother electronic devices. There are many different types of memoryincluding volatile and non-volatile memory. Volatile memory can requirepower to maintain its data and can include random-access memory (RAM),dynamic random access memory (DRAM), and synchronous dynamic randomaccess memory (SDRAM), among others. Non-volatile memory can retainstored data when not powered and can include NAND flash memory, NORflash memory, phase change random access memory (PCRAM), resistiverandom access memory (RRAM), and magnetic random access memory (MRAM),among others.

Memory devices can be combined together to form a solid state drive(SSD). An SSD can include non-volatile memory (e.g., NAND flash memory,NOR flash memory, eMultiMediaCard (eMMC) memory, universal flash storage(UFS) memory, and/or wireless memory), and/or can include volatilememory (e.g., DRAM and/or SRAM), among various other types ofnon-volatile and volatile memory. Flash memory devices can includememory cells storing data in a charge storage structure such as afloating gate, for instance, and may be utilized as non-volatile memoryfor a wide range of electronic applications. Flash memory devices mayuse a one-transistor memory cell that allows for high memory densities,high reliability, and low power consumption.

Memory cells in an array architecture can be programmed to a target(e.g., desired) state. For instance, electric charge can be placed on orremoved from the charge storage structure (e.g., floating gate) of amemory cell to program the cell to a particular data state. The storedcharge on the charge storage structure of the memory cell can indicate athreshold voltage (Vt) of the cell, and the state (e.g., data state) ofthe memory cell can be determined by sensing the stored charge on thecharge storage structure (e.g., the Vt) of the cell.

Memory may consume power (e.g., current at a regulated voltage supply)while operating, such as during program, sense, and/or erase operationsperformed on the cells of the memory. This power can be provided to thememory by, for example, a host. However, the memory may not be aware ofhow much (e.g., the maximum amount of) power the host can provide to thememory, and accordingly the memory may not be aware of whether it willhave enough power to sustain its present operation. If the memory'spower consumption during operation exceeds the amount of power that canbe provided by the host, the memory's operation may fail.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a block diagram of a computing system in accordancewith a number of embodiments of the present disclosure.

FIG. 2 illustrates an example of timing diagrams associated withproviding power availability information to memory in accordance with anumber of embodiments of the present disclosure.

FIG. 3 illustrates an example of timing diagrams associated withproviding power availability information to memory in accordance with anumber of embodiments of the present disclosure.

FIG. 4 illustrates an example of timing diagrams associated withproviding power availability information to memory in accordance with anumber of embodiments of the present disclosure.

DETAILED DESCRIPTION

The present disclosure includes apparatuses and methods for providingpower availability information to memory. A number of embodimentsinclude a memory and a controller. The controller is configured toprovide power and power availability information to the memory, and thememory is configured to determine whether to adjust its operation based,at least in part, on the power availability information.

Providing power availability information to memory in accordance withthe present disclosure can inform the memory of whether, and/or theamount of time for which, the memory can continue to operate (e.g., haveenough power to continue operating) at its present operating condition(e.g., present power consumption). If the power availability informationindicates the memory may not be able to continue to operate at itspresent operation condition, the memory can adjust its operationaccordingly, and thereby avoid failure.

As used herein, “a number of” something can refer to one or more suchthings. For example, a number of memory cells can refer to one or morememory cells.

The figures herein follow a numbering convention in which the firstdigit or digits correspond to the drawing figure number and theremaining digits identify an element or component in the drawing.Similar elements or components between different figures may beidentified by the use of similar digits.

FIG. 1 illustrates a block diagram of a computing system 100 inaccordance with a number of embodiments of the present disclosure. Asshown in FIG. 1, computing system 100 can include a host 102 and anapparatus in the form of a memory device 104. As used herein, an“apparatus” can refer to, but is not limited to, any of a variety ofstructures or combinations of structures, such as a circuit orcircuitry, a die or dice, a module or modules, a device or devices, or asystem or systems, for example.

Host 102 can include a memory (e.g., a random-access memory (RAM)) and amemory access device (e.g., a processor) (not shown in FIG. 1 so as notto obscure embodiments of the present disclosure). One of ordinary skillin the art will appreciate that “a processor” can intend a number ofprocessors, such as a parallel processing system, a number ofcoprocessors, etc. Example hosts can include laptop computers, personalcomputers, digital cameras, digital recording and playback devices,mobile devices (e.g., smart phones, tablets, etc.), PDAs, memory cardreaders, interface hubs, and the like.

As shown in FIG. 1, memory device 104 can include a host interface 106,a memory 110, and a controller 108 coupled to host interface 106 andmemory 110. In a number of embodiments, memory device 104 can be a solidstate memory device. Although one memory is shown in FIG. 1, embodimentsof the present disclosure are not so limited (e.g., memory device 104can include more than one memory coupled to controller 108).

Host interface 106 can be used to receive power from host 102, and/or tocommunicate information (e.g., data) between host 102 and memory device104. For example, host interface 106 can provide an interface forpassing control, address, information (e.g., data), and other signalsbetween memory device 104 and host 102, which can have compatiblereceptors for host interface 106.

In a number of embodiments, host interface 106 can be a physical hostinterface, such as a standardized physical interface. For example, whenmemory device 104 is used for information storage in computing system100, host interface 106 can be a serial advanced technology attachment(SATA) physical interface, a peripheral component interconnect express(PCIe) physical interface, or a universal serial bus (USB) physicalinterface, among other physical connectors and/or interfaces. In suchembodiments, memory device 104 can receive power from, and/orcommunicate information with, host 102 through a wired connection withhost 102 (e.g., host 102 and memory device 104 can be coupled through awired connection).

In a number of embodiments, host interface 106 can be a wireless hostinterface. For example, host interface 106 can include a transceiverand/or antenna that can transmit and/or receive wireless (e.g.,over-the-air) signals, such as, for instance, radio frequency (RF)signals. In such embodiments, memory device 104 can receive power from,and/or communicate information with, host 102 through a wirelessconnection with host 102 (e.g., host 102 and memory device 104 can bewirelessly coupled). For example, in such embodiments, memory device 104can be a wireless memory tag.

Controller 108 can communicate with memory 110 to sense (e.g., read),program (e.g., write), and/or erase information, among other operations.Controller 108 can include, for example, control circuitry and/or logic(e.g., hardware and/or firmware). For instance, controller 108 caninclude a power management unit (PMU) 112, as illustrated in FIG. 1. PMU112 can receive power from host 102 (e.g., through host interface 106),determine power availability information for memory 110, and provide thepower and power availability information to memory 110, as will befurther described herein. In embodiments in which host interface 106 isa wireless host interface (e.g., in embodiments in which memory device104 is a wireless memory tag), controller 108 can be an RF control unit.

Controller 108 can be included on the same physical device (e.g., thesame die) as memory 110, or can be included on a separate physicaldevice that is communicatively coupled to the physical device thatincludes memory 110. In a number of embodiments, components ofcontroller 108 can be spread across multiple physical devices (e.g.,some components on the same die as memory 110, and some components on adifferent die, module, or board).

Memory 110 can include, for example, a number of non-volatile memoryarrays (e.g., can include a number of non-volatile memory cells). Forinstance, memory 110 can be flash memory with a NAND architecture.However, embodiments of the present disclosure are not limited to aparticular type of memory. For example, in a number of embodiments,memory 110 can be eMultiMediaCard (eMMC) memory, universal flash storage(UFS) memory, and/or wireless memory.

In a NAND architecture, the control gates of memory cells of a “row” canbe coupled with an access (e.g., word) line, while the memory cells canbe coupled in series source to drain in a “string” between a select gatesource transistor and a select gate drain transistor. The string can beconnected to a data (e.g., bit) line by the select gate draintransistor. The use of the terms “row” and “string” implies neither alinear nor an orthogonal arrangement of memory cells. As will beappreciated by those of ordinary skill in the art, the manner ofconnection of the memory cells to the bit lines and source lines dependson whether the array is a NAND architecture, a NOR architecture, or someother memory array architecture.

The memory array(s) of memory 110 can include a number of memory cellsthat can be grouped. As used herein, a group can include a number ofmemory cells, such as a page, block, plane, die, an entire array, orother groups of memory cells. For example, some memory arrays caninclude a number of pages of memory cells that make up a block of memorycells. A number of blocks can be included in a plane of memory cells. Anumber of planes of memory cells can be included on a die. As anexample, a 128 GB memory device can include 4320 bytes of informationper page, 128 pages per block, 2048 blocks per plane, and 16 planes perdevice.

The embodiment illustrated in FIG. 1 can include additional circuitrythat is not illustrated so as not to obscure embodiments of the presentdisclosure. For example, memory device 104 can include address circuitryto latch address signals provided over I/O connectors through I/Ocircuitry. Address signals can be received and decoded by a row decoderand a column decoder, to access memory 110 (e.g., the array(s) of memory110).

In a number of embodiments, controller 108 (e.g., PMU 112) can receivepower from host 102 through host interface 106. Controller 108 canreceive the power from host 102 through a wired or wireless connectionwith host 102, as previously described herein. In embodiments incontroller 108 receives power from host 102 through a wirelessconnection, the amount of power controller 108 receives from host 102may depend on (e.g., vary with) the distance between host 102 and memorydevice 104. For example, the greater the distance between host 102 andmemory device 104, the less power controller 108 may receive from host102. Further, controller 108 may receive no power from host 102 ifmemory device 104 is more than a particular distance away from host 102(e.g., if memory device 104 is outside the wireless range of host 102).

Controller 108 (e.g., PMU 112) can determine power availabilityinformation for memory 110. Controller 108 can determine the poweravailability information based on, for example, the amount of powerreceived from host 102 and the present operating condition of memory110. The amount of power received from host 102 can correspond to, forexample, the maximum current level (e.g., amount of current at a givenvoltage supply level) controller 108 can provide to memory 110. Thepresent operating condition of memory 110 can include, for example, thepresent current consumption at the given (e.g., regulated) voltagesupply level (e.g., 1.8 Volts) of memory 110 (e.g., the amount ofcurrent being consumed by memory 110 during the program, sense, and/orerase operation presently being performed on memory 110).

The power availability information for memory 110 can include, forexample, an indication of whether memory 110 can continue to operate atits present operating condition. That is, the power availabilityinformation can include an indication of whether controller 108 cancontinue to provide enough power (e.g., current) to memory 110 formemory 110 to continue operating at its present operating condition(e.g., for the memory to continue its present program, sense, and/orerase operation). For example, the power availability information caninclude an indication memory 110 can continue to operate at its presentoperating condition upon controller 108 determining it is receivingenough power from host 102 to continue to provide enough power to memory110 for it to continue operating at its present operating condition, andthe power availability information can include an indication memory 110can not continue to operate at its present operating condition uponcontroller 108 determining it is not receiving enough power from host102 to continue to provide enough power to memory 110 for it to continueoperating at its present operating condition.

As an example, the power availability information may include anindication to memory 110 to freeze (e.g., pause) its operation upon thevoltage supply being provided to memory 110 by controller 108 reaching(e.g., falling to) a particular (e.g., threshold) level. While theoperation of memory 110 is frozen (e.g., while memory 110 is onstandby), controller 108 can recover the voltage supply. Once thevoltage supply is recovered (e.g., upon controller 108 determining itcan provide enough power to memory 110), memory 110 can resume itsoperation.

As an additional example, the power availability information may includean indication to memory 110 to abort its operation upon controller 108ceasing to receive power from host 102. Controller 108 may cease toreceive power from host 102, for example, upon memory device 104 beingturned off (either intentionally or unintentionally), and/or upon memorydevice 104 being moved outside the wireless range of host 102.

The power availability information for memory 110 may also include anindication of the amount (e.g., period) of time for which memory 110 cancontinue to operate at its present operating condition. That is, thepower availability information can include an indication of how longcontroller 108 can continue to provide enough power to memory 110 formemory 110 to continue operating at its present operating condition.

For example, the amount of time for which memory 110 can continue tooperate at its present operating condition can be the amount of time forwhich memory 110 can continue its present current consumption before thevoltage supply controller 108 provides to memory 110 reaches (e.g.,falls to) a particular (e.g., threshold) level. Further, the amount oftime can be one of a number of amounts of time. For instance, the amountof time can be unlimited, long, intermediate or short. That is, in suchan example, the power availability information may include an indicationmemory 110 can continue to operate at its present operating conditionfor an unlimited amount of time, a first (e.g., long) amount of timethat is less than the unlimited amount of time, a second (e.g.,intermediate) amount of time that is less than the first amount of time,or a third (e.g., short) amount of time that is less than the secondamount of time. The different amounts of time may depend on, forexample, the characteristics (e.g., technology, architecture,performance, etc.) of memory 110. As an example, the first, second, andthird amounts of time can be 75 microseconds, 50 microseconds, and 25microseconds, respectively. However, embodiments of the presentdisclosure are not limited to particular amounts of time, or to aparticular number of amounts of time.

In a number of embodiments, controller 108 (e.g., PMU 112) can providepower (e.g., the power received from host 102) and the determined poweravailability information to memory 110. That is, memory 110 can receivepower and the determined power availability information from controller108. For instance, controller 108 can represent the power availabilityinformation using a number of binary data values (e.g., bits), andcommunicate (e.g., send) the data values to memory 110. As an example,in embodiments in which the power availability information includes anindication of whether memory 110 can continue to operate at its presentoperating condition, an indication memory 110 can continue to operate atits present operating condition can be represented by data value 0, andan indication memory 110 can not continue to operate at its presentoperating condition can be represented by data value 1.

As an additional example, in embodiments in which the power availabilityinformation includes an indication of the amount of time for whichmemory 110 can continue to operate at its present operating condition,an indication memory 110 can continue to operate at its presentoperating condition for an unlimited amount of time can be representedby data value 000, an indication memory 110 can continue to operate atits present operating condition for a long amount of time can berepresented by data value 001, an indication memory 110 can continue tooperate at its present operating condition for an intermediate amount oftime can be represented by data value 010, and an indication memory 110can continue to operate at its present operating condition for a shortamount of time can be represented by data value 011. Further, in suchembodiments, an indication to memory 110 to freeze its operation can berepresented by data value 100, 101, or 110, and in indication to memory110 to abort its operation can be represented by data value 111.However, embodiments of the present disclosure are not limited toparticular data values or combinations of data values.

In the embodiment illustrated in FIG. 1, memory 110 includes aconfiguration register 114. In such an embodiment, controller 108 canprovide the power availability information to memory 110 throughconfiguration register 114. As an additional example, controller 108 canprovide the power availability information to memory 110 through anumber of interface signals (e.g., address signals, data signals, etc.).

In a number of embodiments, memory 110 can determine whether to adjustits operation based, at least in part, on the power availabilityinformation received from controller 108. For example, memory 110 cancontinue to operate at its present operating condition (e.g., continueits present program, sense, and/or erase operation) upon the poweravailability information including an indication memory 110 can continueto operate at its present operating condition, and memory 110 can ceaseoperating at its present operating condition (e.g., abort or freeze itspresent program, sense, and/or erase operation) upon the poweravailability information including an indication memory 110 can notcontinue to operate at its present operating condition. As an additionalexample, upon the power availability information including an indicationmemory 110 can continue to operate at its present operating conditionfor an amount of time, memory 110 can continue to operate at its presentoperating condition for the amount of time.

Controller 108 can continue to determine and provide power availabilityinformation to memory 110 during operation of memory device 104. Forexample, controller 108 can determine and provide additional (e.g.,updated) power availability information to memory 110 upon (e.g., basedon) a change in the amount of power received from host 102, and/or upona change in the operating condition of memory 110. That is, controller108 can determine and provide additional power availability informationto memory 110 upon a change in the maximum current level at a givenvoltage supply controller 108 can provide to memory 110, and/or upon achange in current consumption by (e.g., the current consumption levelof) memory 110. Further, controller 108 can determine and provideadditional power availability information to memory 110 upon the voltagesupply that controller 108 provides to memory 110 reaching (e.g.,falling to) a particular (e.g., threshold) level. The additional poweravailability information can include, for example, an indication ofwhether, and/or the amount of time for which, memory 110 can continue tooperate at its present operating condition, in a manner analogous to thepower availability information previously described herein. Uponreceiving the additional power availability information, memory 110 candetermine whether to adjust its operation based, at least in part, onthe additional power availability information, in a manner analogous tothat previously described herein.

FIG. 2 illustrates an example of timing diagrams 220 and 221 associatedwith providing power availability information to memory in accordancewith a number of embodiments of the present disclosure. The memory canbe, for example, memory 110 previously described in connection with FIG.1.

As shown in FIG. 2, timing diagram 220 includes waveform 222, whichrepresents the amount of voltage supply a controller in communicationwith the memory (e.g., controller 108 previously described in connectionwith FIG. 1) is providing (e.g., supplying) to the memory duringoperation of the memory. Timing diagram 220 also includes waveform 224,which represents the maximum current level at a given voltage supply(e.g., 1.8 Volts) the controller can provide to the memory during theoperation of the memory. The maximum current level at the given voltagesupply can correspond to the amount of power the controller receivesfrom a host, as previously described herein (e.g., in connection withFIG. 1). In the example illustrated in FIG. 2, the maximum current levelat the given voltage supply remains constant (e.g., the same) throughoutthe operation of the memory. As shown in FIG. 2, timing diagram 221includes waveform 226, which represents the current consumption by thememory during the operation of the memory.

At initial time t0 in the example illustrated in FIG. 2, the currentconsumption at the given voltage supply by the memory is at a higherlevel than the maximum current level at the given voltage supply thecontroller can provide to the memory. For instance, the currentconsumption by the memory at time t0 may be 50 milliamps (mA), but themaximum current level at the given voltage supply the controller canprovide to the memory at time t0 may only be 25 mA. As such, thecontroller may provide power availability information to the memory thatindicates the memory can only continue to operate at its presentoperating condition (e.g., its present current consumption level) for aparticular amount of time before the voltage supply the controllerprovides to the memory reaches (e.g., falls to) the threshold levelillustrated in FIG. 2. The particular amount of time can be, forexample, one of a number of amounts of time, such as, for instance, along amount of time, as previously described herein (e.g., in connectionwith FIG. 1). In response to receiving the power availabilityinformation from the controller, the memory may continue to operate atits present operating condition (e.g., may continue to consume 50 mA ofcurrent) for the particular amount of time (e.g., from time t0 to timet1), as illustrated in FIG. 2.

At time t1, the voltage supply being provided to the memory by thecontroller reaches the threshold level, as illustrated in FIG. 2. Assuch, the controller may provide power availability information to thememory that includes an indication to the memory to freeze (e.g., pause)its operation. In response to receiving this power availabilityinformation, the memory may freeze its operation (e.g., move to standbyand/or consume no current) at time t1, as illustrated in FIG. 2. Whilethe operation of the memory is frozen (e.g., from time t1 to time t2),the controller can recover its voltage supply, as illustrated in FIG. 2.

At time t2, the voltage supply of the controller has been fullyrecovered, and the memory has resumed its operation at currentconsumption level 228 (e.g., 50 mA), as illustrated in FIG. 2. As such,the controller may again provide power availability information to thememory that indicates the memory can only continue to operate at itspresent operating condition for the particular amount of (e.g., long)time before the voltage supply the controller provides to the memoryreaches the threshold level. In response to receiving the poweravailability information from the controller, the memory may continue tooperate at its present operating condition, as illustrated in FIG. 2.

At time t3, the memory has increased its current consumption to level230 (e.g., 70 mA), as illustrated in FIG. 2. This increase may be aresult of, for example, a change in the operation of (e.g., beingperformed on) the memory. As a result of this increase, the controllermay provide power availability information to the memory that indicatesthe memory can only continue to operate at that operating condition(e.g., current consumption level 230) for a shorter amount of timebefore the voltage supply the controller provides to the memory reachesthe threshold level. The shorter amount of time can be a different oneof the amounts of time, such as, for instance, a short amount of time,as previously described herein. In response to receiving this poweravailability information from the controller, the memory may continue tooperate at its present operating condition (e.g., may continue toconsume 70 mA of current) for the shorter amount of time (e.g., fromtime t3 to time t4), as illustrated in FIG. 2.

At time t4, the voltage supply being provided to the memory by thecontroller reaches the threshold level, as illustrated in FIG. 2. Assuch, the controller may provide power availability information to thememory that includes an indication to the memory to freeze itsoperation. In response to receiving this power availability information,the memory may freeze its operation at time t4, as illustrated in FIG.2. While the operation of the memory is frozen (e.g., from time t4 totime t5), the controller can recover its voltage supply, as illustratedin FIG. 2.

At time t5, the voltage supply of the controller has been fullyrecovered, and the memory has resumed its operation at currentconsumption level 230 (e.g., 70 mA) at the given voltage supply, asillustrated in FIG. 2. As such, the controller may again provide poweravailability information to the memory that indicates the memory canonly continue to operate at its present operating condition for theshorter time before the voltage supply the controller provides to thememory reaches the threshold level. In response to receiving this poweravailability information from the controller, the memory may continue tooperate at its present operating condition, as illustrated in FIG. 2.

At time t6, the memory has decreased its current consumption at thegiven voltage supply to level 232 (e.g., 20 mA), as illustrated in FIG.2, which is below (e.g., less than) the maximum current level (e.g., 25mA) at the given voltage supply the controller can provide to thememory. This decrease may be a result of, for example, a change in theoperation of (e.g., being performed on) the memory As a result of thisdecrease, the controller may provide power availability information tothe memory that indicates the memory can continue to operate at itspresent operating condition for an unlimited amount of time. In responseto receiving this power availability information from the controller,the memory may continue to operate at its present operating condition(e.g., may continue to consume 20 mA of current), as illustrated in FIG.2.

FIG. 3 illustrates an example of timing diagrams 340 and 341 associatedwith providing power availability information to memory in accordancewith a number of embodiments of the present disclosure. The memory canbe, for example, memory 110 previously described in connection with FIG.1.

As shown in FIG. 3, timing diagram 340 includes waveform 342, whichrepresents the amount of voltage supply a controller in communicationwith the memory (e.g., controller 108 previously described in connectionwith FIG. 1) is providing (e.g., supplying) to the memory duringoperation of the memory. Timing diagram 340 also includes waveform 344,which represents the maximum current level at a given voltage supply(e.g., 1.8 Volts) the controller can provide to the memory during theoperation of the memory. The maximum current level at the given voltagesupply can correspond to the amount of power the controller receivesfrom a host, as previously described herein (e.g., in connection withFIG. 1). As shown in FIG. 3, timing diagram 341 includes waveform 346,which represents the current consumption by the memory during theoperation of the memory. From initial time t0 to time t3 in the exampleillustrated in FIG. 3, timing diagrams 340 and 341 can be analogous totiming diagrams 220 and 221, respectively, previously described inconnection with FIG. 2 from initial time t0 to time t3.

At time t3, the maximum current level at the given voltage supply thecontroller can provide to the memory has increased to level 348 (e.g.,100 mA), as illustrated in FIG. 3, which is above (e.g., greater than)the current consumption by the memory at time t3 (e.g., currentconsumption level 350). This increase may be a result of, for example,the memory and/or controller being moved closer to the host inembodiments in which the controller receives power from the host througha wireless connection. As a result of this increase, the controller mayprovide power availability information to the memory that indicates thememory can continue to operate at its present operating condition for anunlimited amount of time. In response to receiving this poweravailability information from the controller, the memory may continue tooperate at its present operating condition (e.g., current consumptionlevel 350), as illustrated in FIG. 3.

At time t4, the memory has increased its current consumption at thegiven voltage supply to level 352 (e.g., 70 mA), as illustrated in FIG.3. This increase may be a result of, for example, a change in theoperation of (e.g., being performed on) the memory. However, becausethis increase does not result in the memory's current consumption at theregulated voltage supply exceeding the maximum current level thecontroller can provide to the memory at time t4 (e.g., 100 mA), noadditional (e.g., updated) power availability information may beprovided to the memory by the controller, and the memory may continue tooperate at its present operating condition (e.g., current consumptionlevel 352), as illustrated in FIG. 3.

FIG. 4 illustrates an example of timing diagrams 460 and 461 associatedwith providing power availability information to memory in accordancewith a number of embodiments of the present disclosure. The memory canbe, for example, memory 110 previously described in connection with FIG.1.

As shown in FIG. 4, timing diagram 460 includes waveform 462, whichrepresents the amount voltage supply a controller in communication withthe memory (e.g., controller 108 previously described in connection withFIG. 1) is providing (e.g., supplying) to the memory during operation ofthe memory. Timing diagram 460 also includes waveform 464, whichrepresents the maximum current level at a given voltage supply thecontroller can provide to the memory during the operation of the memory.The maximum current level at the given voltage supply can correspond tothe amount of power the controller receives from a host, as previouslydescribed herein (e.g., in connection with FIG. 1). As shown in FIG. 4,timing diagram 461 includes waveform 466, which represents the currentconsumption by the memory during the operation of the memory. Frominitial time t0 to time t3 in the example illustrated in FIG. 4, timingdiagrams 460 and 461 can be analogous to timing diagrams 220 and 221,respectively, previously described in connection with FIG. 2 frominitial time t0 to time t3.

At time t3 in the example illustrated in FIG. 4, the controller hasceased to receive power from the host. As such, the amount of powerbeing provided to the memory by the controller and the maximum currentlevel at the voltage supply the controller can provide to the memorydecrease to levels 468 and 470 (e.g., zero), respectively, as shown inFIG. 4. Further, upon the controller ceasing to receive power from thehost, the controller may provide power availability information to thememory that includes an indication to the memory to abort its operation.In response to receiving this power availability information, the memorymay abort its operation (e.g., reduce its current consumption from level472 to zero) at time t3, as illustrated in FIG. 4.

Although specific embodiments have been illustrated and describedherein, those of ordinary skill in the art will appreciate that anarrangement calculated to achieve the same results can be substitutedfor the specific embodiments shown. This disclosure is intended to coveradaptations or variations of a number of embodiments of the presentdisclosure. It is to be understood that the above description has beenmade in an illustrative fashion, and not a restrictive one. Combinationof the above embodiments, and other embodiments not specificallydescribed herein will be apparent to those of ordinary skill in the artupon reviewing the above description. The scope of a number ofembodiments of the present disclosure includes other applications inwhich the above structures and methods are used. Therefore, the scope ofa number of embodiments of the present disclosure should be determinedwith reference to the appended claims, along with the full range ofequivalents to which such claims are entitled.

In the foregoing Detailed Description, some features are groupedtogether in a single embodiment for the purpose of streamlining thedisclosure. This method of disclosure is not to be interpreted asreflecting an intention that the disclosed embodiments of the presentdisclosure have to use more features than are expressly recited in eachclaim. Rather, as the following claims reflect, inventive subject matterlies in less than all features of a single disclosed embodiment. Thus,the following claims are hereby incorporated into the DetailedDescription, with each claim standing on its own as a separateembodiment.

What is claimed is:
 1. A method, comprising: receiving first signalingthat indicates through a configuration register of a memory device thata host will keep power active at the memory device to support a presentoperating condition of the memory device and second signaling thatindicates an amount of time until the memory device will cease receivingpower from the host, the amount of time comprising an unlimited amountof time, a first amount of time that is less than the unlimited amountof time, a second amount of time that is less than the first amount oftime, or a third amount of time that is less than the second amount oftime; and continuing to operate the memory device in the presentoperating condition for the amount of time indicated by the secondsignaling, while the host waits for a communication from the memorydevice on an interface between the host and the memory device.
 2. Themethod of claim 1, further comprising transmitting signaling to the hostat a time that is based at least in part on the amount of time indicatedby the second signaling.
 3. The method of claim 1, further comprisingchanging an operating condition of the memory device from the presentoperating condition to another operating condition before the amount oftime indicated by the second signaling ends.
 4. The method of claim 3,wherein changing the operating condition comprises changingcommunication from the memory device on the interface between the hostand the memory device.
 5. The method of claim 1, wherein the methodincludes receiving the first signaling and the second signaling from thehost.
 6. An apparatus, comprising: a memory; a configuration registerconfigured to receive first signaling that indicates that a host willkeep power active at the memory to support a present operating conditionof the apparatus; and a controller configured to continue, while thehost waits for a communication from the apparatus on an interfacebetween the host and the apparatus, to operate the apparatus in thepresent operating condition for an amount of time that is based at leastin part on second signaling from the host that indicates an amount oftime until the apparatus will cease to receive power, the amount of timecomprising an unlimited amount of time, a first amount of time that isless than the unlimited amount of time, a second amount of time that isless than the first amount of time, or a third amount of time that isless than the second amount of time.
 7. The apparatus of claim 6,wherein the controller is configured to continue to operate theapparatus in the present operating condition after the amount of timeindicated by the second signaling.
 8. The apparatus of claim 6, whereinthe controller is configured to operate the apparatus in a differentoperating condition after the amount of time indicated by the secondsignaling.
 9. The apparatus of claim 6, wherein the configurationregister is configured to receive the second signaling.
 10. Theapparatus of claim 6, wherein the memory comprises a plurality ofnon-volatile memory arrays.
 11. A method, comprising: transmitting firstsignaling that indicates through a configuration register of a memorydevice that a host will keep power active at the memory device tosupport a present operating condition of the memory device and secondsignaling that indicates an amount of time until the memory device willcease receiving power from the host, the amount of time comprising anunlimited amount of time, a first amount of time that is less than theunlimited amount of time, a second amount of time that is less than thefirst amount of time, or a third amount of time that is less than thesecond amount of time; and monitoring an interface between the host andthe memory device for a communication that indicates that the memorydevice is continuing to operate in the present operating condition forthe amount of time indicated by the second signaling.
 12. The method ofclaim 11, further comprising receiving signaling at a time that is basedat least in part on the amount of time indicated by the secondsignaling.
 13. The method of claim 11, further comprising receiving anindication of a changing of an operating condition of the memory devicefrom the present operating condition to another operating conditionbefore the amount of time indicated by the second signaling ends. 14.The method of claim 13, wherein the indication of the changing of theoperating condition comprises a changing of communication from thememory device on the interface between the host and the memory device.15. The method of claim 11, wherein the method includes transmitting thefirst signaling and the second signaling to the memory device.
 16. Anapparatus, comprising: an interface configured to: transmit firstsignaling that indicates through a configuration register of a memorydevice that the apparatus will keep power active at the memory device tosupport a present operating condition of the memory device and secondsignaling that indicates an amount of time until the memory device willcease receiving power from the apparatus, the amount of time comprisingan unlimited amount of time, a first amount of time that is less thanthe unlimited amount of time, a second amount of time that is less thanthe first amount of time, or a third amount of time that is less thanthe second amount of time; and monitor for a communication thatindicates that the memory device is continuing to operate in the presentoperating condition for the amount of time indicated by the secondsignaling.
 17. The apparatus of claim 16, wherein the interface isconfigured to provide the power from the apparatus to the memory device.18. The apparatus of claim 16, wherein the second signaling includessignaling to increase a maximum current level provided to the memorydevice.
 19. The apparatus of claim 16, wherein the interface is furtherconfigured to monitor for a communication that indicates that the memorydevice is continuing to operate in the present operating condition afterthe amount of time indicated by the second signaling.
 20. The apparatusof claim 16, wherein the interface is further configured to monitor fora communication that indicates that the memory device is operating in adifferent operating condition after the amount of time indicated by thesecond signaling.